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x in (-oo:+oo)
(1/8)*(x-18)-((1/6)*(x+8)) = x+5 // - x+5
(1/8)*(x-18)-((1/6)*(x+8))-x-5 = 0
(1/8)*(x-18)+(-1/6)*(x+8)-x-5 = 0
1/8*(x-18)-1/6*(x+8)-x-5 = 0
1/8*(x-18)-1/6*(x+8)-x-5 = 0
-1/24*x-x-5-43/12 = 0
-25/24*x-5-43/12 = 0
-25/24*x-103/12 = 0
-25/24*x-103/12 = 0
-25/24*x-103/12 = 0 // + 103/12
-25/24*x = 103/12 // : -25/24
x = 103/12/(-25/24)
x = -206/25
x = -206/25
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